Filter out link-local routes from VPP main interface routing table

Aritra Basu · Aritra Basu · commit 6e59606f358a · 2026-01-24T18:55:53.000-05:00
Link-local addresses are not routable. When synchronizing Linux
routes to VPP's uplink interface, filter out link-local addresses
so that they are not added to VPP's main VRF routing table.

Signed-off-by: Aritra Basu &lt;aritrbas@cisco.com&gt;
diff --git a/vpp-manager/vpp_runner.go b/vpp-manager/vpp_runner.go
@@ -552,6 +552,10 @@ func (v *VppRunner) configureVppUplinkInterface(
 		}
 	}
 	for _, route := range ifState.Routes {
+		if route.Dst != nil && route.Dst.IP.IsLinkLocalUnicast() {
+			log.Infof("Skipping link-local route %s", route.Dst.String())
+			continue
+		}
 		err = v.vpp.RouteAdd(&types.Route{
 			Dst: route.Dst,
 			Paths: []types.RoutePath{{

Original file line number	Diff line number	Diff line change
`@@ -552,6 +552,10 @@ func (v *VppRunner) configureVppUplinkInterface(`
`552`	`552`	`}`
`553`	`553`	`}`
`554`	`554`	`for _, route := range ifState.Routes {`
	`555`	`+ if route.Dst != nil && route.Dst.IP.IsLinkLocalUnicast() {`
	`556`	`+ log.Infof("Skipping link-local route %s", route.Dst.String())`
	`557`	`+ continue`
	`558`	`+ }`
`555`	`559`	`err = v.vpp.RouteAdd(&types.Route{`
`556`	`560`	`Dst: route.Dst,`
`557`	`561`	`Paths: []types.RoutePath{{`